Mercurial > boomslang
annotate pyntnclick/widgets/base.py @ 726:efa58c92b304 pyntnclick
Move prepare out of __init__ and into everywhere else
author | Neil Muller <neil@dip.sun.ac.za> |
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date | Tue, 15 Jan 2013 22:44:50 +0200 |
parents | 3b2d1adca59c |
children | bcc9277a23e6 |
rev | line source |
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1 import collections |
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2 |
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3 import pygame |
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4 from pygame.locals import (MOUSEBUTTONDOWN, MOUSEBUTTONUP, |
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5 MOUSEMOTION, SRCALPHA, USEREVENT, |
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6 BLEND_RGBA_MIN) |
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7 |
558 | 8 from pyntnclick.engine import UserEvent |
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9 |
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10 |
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11 class Widget(object): |
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12 |
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13 highlight_cursor = False |
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14 |
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15 def __init__(self, rect, gd): |
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16 if not isinstance(rect, pygame.Rect): |
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17 rect = pygame.Rect(rect, (0, 0)) |
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18 self.rect = rect |
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19 self.gd = gd |
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20 self.resource = gd.resource |
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21 self.modal = False |
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22 self.parent = None |
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23 self.disabled = False |
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24 self.callbacks = collections.defaultdict(list) |
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25 # To track which widget the mouse is over |
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26 self.mouseover_widget = self |
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27 self.is_prepared = False |
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28 |
694 | 29 def set_parent(self, parent): |
30 self.parent = parent | |
31 | |
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32 def add_callback(self, eventtype, callback, *args): |
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33 self.callbacks[eventtype].append((callback, args)) |
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34 |
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35 def event(self, ev): |
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36 "Don't override this without damn good reason" |
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37 if self.disabled: |
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38 return True |
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39 |
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40 type_ = ev.type |
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41 if type_ == USEREVENT: |
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42 for k in self.callbacks.iterkeys(): |
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43 if (isinstance(k, type) and issubclass(k, UserEvent) |
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44 and k.matches(ev)): |
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45 type_ = k |
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46 break |
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47 |
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48 for callback, args in self.callbacks[type_]: |
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49 if callback(ev, self, *args): |
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50 return True |
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51 return False |
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52 |
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53 def draw(self, surface): |
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54 "Override me" |
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55 pass |
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56 |
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57 def prepare(self): |
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58 """Override me""" |
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59 pass |
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60 |
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61 def do_prepare(self): |
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62 if not self.is_prepared: |
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63 self.prepare() |
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64 self.is_prepared = True |
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65 |
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66 def disable(self): |
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67 if not self.disabled: |
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68 self.disabled = True |
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69 self.prepare() |
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70 self.is_prepared = True |
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71 |
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72 def enable(self): |
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73 if self.disabled: |
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74 self.disabled = False |
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75 self.prepare() |
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76 self.is_prepared = True |
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77 |
652 | 78 def global_to_local(self, pos): |
79 x, y = pos | |
80 return (x - self.rect.left, y - self.rect.top) | |
81 | |
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82 |
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83 class Button(Widget): |
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84 |
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85 highlight_cursor = True |
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86 |
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87 def event(self, ev): |
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88 if super(Button, self).event(ev): |
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89 return True |
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90 if ev.type == MOUSEBUTTONDOWN: |
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91 for callback, args in self.callbacks['clicked']: |
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92 if callback(ev, self, *args): |
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93 return True |
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94 return False |
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95 |
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96 def forced_click(self): |
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97 """Force calling the clicked handler""" |
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98 for callback, args in self.callbacks['clicked']: |
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99 if callback(None, self, *args): |
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100 return True |
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101 return False |
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102 |
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103 |
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104 class Container(Widget): |
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105 |
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106 def __init__(self, rect, gd): |
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107 if rect is None: |
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108 rect = pygame.Rect(0, 0, 0, 0) |
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109 super(Container, self).__init__(rect, gd) |
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110 self.children = [] |
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111 |
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112 def event(self, ev): |
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113 """Push an event down through the tree, and fire our own event as a |
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114 last resort |
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115 """ |
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116 self.mouseover_widget = self |
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117 if ev.type in (MOUSEMOTION, MOUSEBUTTONUP, MOUSEBUTTONDOWN): |
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118 for child in self.children[:]: |
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119 if child.rect.collidepoint(ev.pos): |
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120 result = child.event(ev) |
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121 self.mouseover_widget = child.mouseover_widget |
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122 if result: |
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123 return True |
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124 |
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125 else: |
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126 # Other events go to all children first |
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127 for child in self.children[:]: |
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128 if child.event(ev): |
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129 return True |
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130 if super(Container, self).event(ev): |
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131 return True |
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132 |
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133 def add(self, widget): |
694 | 134 widget.set_parent(self) |
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135 widget.prepare() |
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136 self.children.append(widget) |
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137 self.rect = self.rect.union(widget.rect) |
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138 return widget |
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139 |
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140 def remove(self, widget): |
694 | 141 widget.set_parent(None) |
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142 self.children.remove(widget) |
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143 |
682 | 144 def remove_all(self): |
145 for widget in reversed(self.children[:]): | |
146 self.remove(widget) | |
147 | |
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148 def draw(self, surface): |
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149 self.do_prepare() |
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150 for child in self.children: |
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151 child.draw(surface) |
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152 |
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153 |
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154 class ModalStackContainer(Container): |
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155 |
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156 def __init__(self, rect, gd, obscure_color=None): |
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157 super(ModalStackContainer, self).__init__(rect, gd) |
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158 if obscure_color is None: |
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159 obscure_color = gd.constants.modal_obscure_color |
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160 self.obscure_color = convert_color(obscure_color) |
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161 |
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162 @property |
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163 def top(self): |
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164 if self.children: |
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165 return self.children[-1] |
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166 return None |
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167 |
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168 def event(self, ev): |
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169 """Only the topmost child gets events. |
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170 """ |
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171 self.mouseover_widget = self |
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172 if self.top: |
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173 self.mouseover_widget = self.top.mouseover_widget |
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174 if self.top.event(ev): |
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175 return True |
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176 |
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177 # We skip Container's event() method and hop straight to its parent's. |
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178 if super(Container, self).event(ev): |
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179 return True |
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180 |
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181 def is_top(self, widget): |
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182 return self.top is widget |
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183 |
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184 def draw(self, surface): |
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185 self.do_prepare() |
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186 obscure = pygame.Surface(self.rect.size, SRCALPHA) |
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187 obscure.fill(self.obscure_color) |
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188 for child in self.children: |
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189 surface.blit(obscure, self.rect) |
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190 child.draw(surface) |
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191 |
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192 |
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193 class GridContainer(Container): |
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194 """Hacky container that only supports grids, won't work with Container |
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195 children, or modal children. |
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196 """ |
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197 |
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198 def __init__(self, width, rect=None): |
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199 super(GridContainer, self).__init__(rect) |
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200 self.width = width |
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201 |
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202 def add(self, widget): |
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203 assert not isinstance(widget, Container) |
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204 assert not widget.modal |
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205 super(GridContainer, self).add(widget) |
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206 |
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207 |
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208 class Box(Container): |
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209 """A container that draws a filled background with a border""" |
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210 padding = 4 |
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211 |
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212 def draw(self, surface): |
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213 self.do_prepare() |
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214 expandrect = self.rect.move((-self.padding, -self.padding)) |
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215 expandrect.width = self.rect.width + 2 * self.padding |
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216 expandrect.height = self.rect.height + 2 * self.padding |
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217 border = pygame.Surface(expandrect.size, SRCALPHA) |
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218 border.fill(pygame.Color('black')) |
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219 surface.blit(border, expandrect) |
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220 background = pygame.Surface(self.rect.size, SRCALPHA) |
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221 background.fill(pygame.Color('gray')) |
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222 surface.blit(background, self.rect) |
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223 super(Box, self).draw(surface) |
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224 |
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225 |
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226 def convert_color(color): |
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227 """Give me a pygame Color, dammit""" |
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228 if isinstance(color, pygame.Color): |
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229 return color |
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230 if isinstance(color, basestring): |
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231 return pygame.Color(color) |
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232 return pygame.Color(*color) |
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233 |
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234 |
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235 class ModalWrapper(Container): |
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236 "A wrapper around a widget that removes itself when a mouse click occurs" |
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237 |
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238 def __init__(self, widget, close_callback=None): |
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239 super(ModalWrapper, self).__init__(widget.rect, widget.gd) |
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240 self.close_callback = close_callback |
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241 self.add(widget) |
694 | 242 self.add_callback(MOUSEBUTTONDOWN, self.close) |
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243 widget.add_callback(MOUSEBUTTONDOWN, self.close) |
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244 |
694 | 245 def set_parent(self, parent): |
246 super(ModalWrapper, self).set_parent(parent) | |
247 if parent: | |
248 self.rect = self.parent.rect | |
249 | |
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250 def close(self, ev, widget): |
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251 if self.parent: |
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252 self.parent.remove(self) |
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253 if self.close_callback: |
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254 self.close_callback() |
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255 return True |
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256 |
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257 |
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258 class Image(Widget): |
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259 """Basic widget that draws an image, with an associated rect""" |
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260 |
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261 def __init__(self, rect, gd, image): |
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262 super(Image, self).__init__(rect, gd) |
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263 self.image = image |
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264 self.rect.width = image.get_rect().width |
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265 self.rect.height = image.get_rect().height |
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266 self.visible = True |
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267 |
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268 def draw(self, surface): |
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269 self.do_prepare() |
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270 if self.visible: |
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271 surface.blit(self.image, self.rect) |
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272 |
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273 |
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274 class TranslucentImage(Image): |
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275 """Image that can also be translucent""" |
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276 |
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277 def __init__(self, rect, gd, image): |
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278 super(TranslucentImage, self).__init__(rect, gd, image) |
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279 self.translucent = False |
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280 surf = pygame.surface.Surface((self.rect.width, self.rect.height), |
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281 SRCALPHA).convert_alpha() |
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282 surf.fill(pygame.color.Color(255, 255, 255, 96)) |
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283 surf.blit(self.image, (0, 0), None, BLEND_RGBA_MIN) |
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284 self.trans_image = surf |
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285 |
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286 def draw(self, surface): |
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287 self.do_prepare() |
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288 if self.visible: |
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289 if self.translucent: |
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290 surface.blit(self.trans_image, self.rect) |
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291 else: |
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292 surface.blit(self.image, self.rect) |